Differences to the old python-for-android project

This python-for-android project is a rewrite, and eventual replacement, for Kivy’s existing python-for-android project. This project existed for some time and, although it is now close to deprecated, there are many resources discussing how to use it.

For this reason, the following documentation gives a basic explanation of how to accomplish that previously used the distribute.sh and build.py toolchain with this new one.